> For the complete documentation index, see [llms.txt](https://wiki.havenprotocol.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.havenprotocol.org/overview/ringct.md).

# RingCT

#### The Basics

RingCT, short for Ring Confidential Transactions, is how transaction amounts are hidden in Haven.

Ring CT was implemented in block #1220516 in January 2017. After September 2017, this feature became mandatory for all transactions on the network.

RingCT introduces an improved version of @ring-signatures called "A Multi-layered Linkable Spontaneous Anonymous Group signature", which allows for hidden amounts, origins and destinations of transactions with reasonable efficiency and verifiable, trustless coin generation.

For more information, please read the creator Shen Noether's paper [here](https://eprint.iacr.org/2015/1098).